Design method for intersecting-axis conical twin-screw rotor profile, rotor and equipment

Abstract

The invention discloses an intersecting-axis conical twin-screw rotor profile design method, a rotor and equipment. The rotor profile design method comprises the steps that a space external meshing model of the conical rotor is established; on a series of spherical surfaces of which the sphere centers are O and the radiuses are different, a molded line family required for forming a cone shape by the rotor 1 is given; according to a space meshing theory, solving a conjugate curve family of a given molded line family as a molded line family required by the rotor 2 to form a cone; the conical spiral lines required by the two rotors to form the conical screw rotor are solved; and scanning the molded line groups of the two rotors along respective conical spiral lines to obtain respective rotor curved surfaces. Compared with an existing parallel-axis conical rotor, the conicity of the generated intersecting-axis conical rotor is larger, the tooth space area between the rotors can be greatly reduced in the axial direction, therefore, the contact lines and leakage triangles of the double-screw rotor are greatly reduced, leakage of a double-screw machine can be effectively reduced theoretically, and the service life of the double-screw machine is prolonged. And meanwhile, the conical structure can improve the stress condition of the rotor.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering design, and in particular relates to a profile design method for a conical twin-screw rotor with intersecting axes, the rotor and equipment. Background technique [0002] Due to the advantages of high efficiency and reliability, the twin-screw rotor has been applied in the field of twin-screw machinery such as twin-screw compressors, twisted lobe roots machines, twin-screw vacuum pumps, and screw pumps. However, this structure also brings problems such as gap leakage and unbalanced rotor force, as well as the resulting energy loss, noise, bearing wear and rotor deformation. The performance of the twin-screw machine depends fundamentally on the structure of a pair of rotors. Therefore, the optimization of the twin-screw rotor structure has been extensively studied. [0003] In recent years, the internal compression technology of twin-screw rotors has been widely used due to its adv...

AI Technical Summary

Problems solved by technology

However, most of the current research on conical rotors is in the field of parallel shaft transmission. The rotor cannot achieve a large taper, and the cross-sectional shape of the rotor will be deformed along the axial direction. These problems limit the potential of the conical rotor.

Therefore, conical rotors driven by intersecting shafts are proposed. At this time, the relationship between the two rotors belongs to the category of spatial meshing, and the generation of the rotor surface is more complicated, but there is no related public literature.

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